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CN119659525A - Method for enabling vehicle functions and associated enabling device - Google Patents

Method for enabling vehicle functions and associated enabling device Download PDF

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Publication number
CN119659525A
CN119659525A CN202411029432.5A CN202411029432A CN119659525A CN 119659525 A CN119659525 A CN 119659525A CN 202411029432 A CN202411029432 A CN 202411029432A CN 119659525 A CN119659525 A CN 119659525A
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CN
China
Prior art keywords
vehicle
enabling
visual recognition
camera
refresh rate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202411029432.5A
Other languages
Chinese (zh)
Inventor
M·谢赫
R·本布胡特
B·杜波依斯
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Continental Automotive Technologies GmbH
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Continental Automotive Technologies GmbH
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Filing date
Publication date
Application filed by Continental Automotive Technologies GmbH filed Critical Continental Automotive Technologies GmbH
Publication of CN119659525A publication Critical patent/CN119659525A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/86Combinations of radar systems with non-radar systems, e.g. sonar, direction finder
    • G01S13/867Combination of radar systems with cameras
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/30Detection related to theft or to other events relevant to anti-theft systems
    • B60R25/305Detection related to theft or to other events relevant to anti-theft systems using a camera
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/01Fittings or systems for preventing or indicating unauthorised use or theft of vehicles operating on vehicle systems or fittings, e.g. on doors, seats or windscreens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/20Means to switch the anti-theft system on or off
    • B60R25/25Means to switch the anti-theft system on or off using biometry
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R25/00Fittings or systems for preventing or indicating unauthorised use or theft of vehicles
    • B60R25/30Detection related to theft or to other events relevant to anti-theft systems
    • B60R25/31Detection related to theft or to other events relevant to anti-theft systems of human presence inside or outside the vehicle
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/0209Systems with very large relative bandwidth, i.e. larger than 10 %, e.g. baseband, pulse, carrier-free, ultrawideband
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06VIMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/16Human faces, e.g. facial parts, sketches or expressions
    • G06V40/172Classification, e.g. identification
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/04Systems determining presence of a target
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/02Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
    • G01S13/50Systems of measurement based on relative movement of target
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/02Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
    • G01S7/40Means for monitoring or calibrating
    • G01S7/4004Means for monitoring or calibrating of parts of a radar system
    • G01S7/4008Means for monitoring or calibrating of parts of a radar system of transmitters
    • G01S7/4013Means for monitoring or calibrating of parts of a radar system of transmitters involving adjustment of the transmitted power

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Health & Medical Sciences (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • General Health & Medical Sciences (AREA)
  • Lock And Its Accessories (AREA)
  • Traffic Control Systems (AREA)

Abstract

本发明涉及一种用于通过启用设备(D)、基于对用户(U)的视觉识别来启用车辆功能的方法,该启用设备包括至少一个相机(C1,C2)以及至少一个超宽带(UWB)收发器(EM1,EM2),该至少一个相机朝向车辆的外部定向并且配备有视觉识别装置,该至少一个超宽带收发器能够检测车辆内部的存在体,该方法的特征在于,首先将收发器修改成允许收发器以不同的刷新速率(F)向车辆的外部进行发射,并且该方法包括以下步骤:a)以第一刷新速率(F0)向车辆的外部进行发射,b)接收反射波,c)检测在车辆周围的预定区域中的存在体,d)根据所述存在体与车辆之间的距离(d)来调整刷新速率(F1,F2),当存在体靠近车辆时,频率更高,e)仅当已在低于阈值的距离(d)处检测到存在体时才启用相机,f)通过视觉识别来标识存在体,g)如果存在体被标识为该用户,则启用该车辆功能。

The invention relates to a method for enabling a vehicle function based on visual recognition of a user (U) by means of an enabling device (D), the enabling device comprising at least one camera (C1, C2) oriented towards the outside of the vehicle and equipped with visual recognition means, and at least one ultra-wideband (UWB) transceiver (EM1, EM2), the at least one camera being oriented towards the outside of the vehicle and being equipped with visual recognition means, the at least one ultra-wideband transceiver being able to detect a presence inside the vehicle, the method being characterized in that the transceiver is first modified to allow the transceiver to transmit to the outside of the vehicle at a different refresh rate (F), and the method comprising the steps of: a) transmitting to the outside of the vehicle at a first refresh rate (F0), b) receiving reflected waves, c) detecting a presence in a predetermined area around the vehicle, d) adjusting the refresh rate (F1, F2) according to the distance (d) between the said presence and the vehicle, the frequency being higher when the presence is close to the vehicle, e) enabling the camera only if the presence has been detected at a distance (d) below a threshold, f) identifying the presence by visual recognition, g) enabling the vehicle function if the presence is identified as the user.

Description

Method for enabling vehicle functions and associated enabling device
[ Technical field ]
The present invention relates to a method for enabling a vehicle function and to an associated enabling device. The invention is particularly useful for "hands-free" locking and unlocking of vehicles by visual identification of the user.
[ Background Art ]
Nowadays it is known to unlock the electronic equipment by visual recognition of the user of the electronic equipment, and thus the handset can be unlocked in this way.
Similarly, a user may take his vehicle and unlock the doors by identifying his face. This therefore allows the user to take his vehicle without having to carry a sign or key or even move a smartphone. For this purpose, the method for taking a vehicle comprises the following steps:
a. a preliminary learning phase, which collects biometric information about the individual to be identified (also called a login phase),
B. a stage of detecting whether a face exists in the image,
C. a stage of segmenting and processing the face image,
D. a stage of recognizing and authenticating the face,
E. finally, if the face has been authenticated, unlocking the opening of the vehicle.
Various solutions for successfully implementing these different steps are known from the prior art. It is therefore known to equip a vehicle with a camera in order to detect the presence of a face, and with a processing device in order to authenticate the face. However, this involves continuous monitoring by the camera, which is relatively energy consuming. When the vehicle is stationary, the camera consumes 1 to 2 watts, which is not negligible. Furthermore, the reaction time of the camera is relatively long, on the order of 1 to 2 seconds, which may create a so-called "wall" effect for the user, as it takes a certain time for the door to unlock.
One solution may be to equip the vehicle with a motion sensor and thus enable the camera only when the presence of the user has been detected, thereby significantly reducing the power consumption of the camera. However, the cost of the overall system is high.
It has therefore been found necessary to overcome the drawbacks of the prior art by proposing a method for enabling vehicle functions which is inexpensive, allows rapid unlocking of the vehicle door and consumes little energy.
The present invention proposes a method for enabling a vehicle function and an associated enabling device meeting the above-mentioned objects.
[ Summary of the invention ]
The invention relates to a method for enabling vehicle functions based on visual recognition of a user by means of an enabling device comprising at least one camera oriented towards the outside of the vehicle and equipped with visual recognition means, and at least one ultra-wideband transceiver capable of detecting the presence of a body inside the vehicle, the method being notable in that firstly the transceiver is modified to allow the transceiver to transmit to the outside of the vehicle at different refresh rates, and in that the method comprises the following steps:
a) An ultra-wideband wave is transmitted to the exterior of the vehicle at a first refresh rate,
B) The reflected wave is received and the reflected wave is received,
C) Detecting the presence of a body in a predetermined area around the vehicle,
D) The refresh rate is adjusted according to the distance (d) between the presentity and the vehicle, with a higher frequency when the presentity is close to the vehicle,
E) The camera is only enabled when the presence of a body has been detected at a distance below the threshold,
F) The presence body is identified by visual recognition,
G) If the presentity is identified as the user, the vehicle function is enabled.
Preferably, the value of the refresh rate varies from 1Hz to over 100Hz.
Advantageously, the distance is determined by calculating the time of flight of the wave and/or by calculating the offset between the frequency of the transmitted wave and the frequency of the received reflected wave.
The invention also relates to a device for enabling vehicle functions, the enabling being triggered by visual recognition of a user, the enabling device comprising at least one camera oriented towards the outside of the vehicle and equipped with visual recognition means, and at least one ultra-wideband transceiver capable of detecting the presence of a body inside the vehicle, the device being notable in that said transceiver is modified so as to transmit towards the outside of the vehicle, and in that the device further comprises:
a) Changing means for changing a refresh rate of the emitted wave,
B) A detecting device for detecting an existing body in a predetermined area around the vehicle and for adjusting the detecting device according to a position of the existing body,
C) Frequency adjustment means for adjusting the refresh rate in accordance with the distance between the existing body and the vehicle, the frequency being higher when the existing body approaches the vehicle,
D) Camera enabling means for enabling the camera only when the presence of the body has been detected at a distance below a threshold value,
E) A vehicle function enabling means for enabling a vehicle function according to a result of identifying the presentity by visual recognition.
Advantageously, the value of the refresh rate varies between 1Hz and more than 100 Hz.
The detection means for detecting and for adjusting the device comprise, judiciously, means for calculating the time of flight of the wave and/or for calculating the offset between the frequency of the transmitted wave and the frequency of the received wave.
The invention also relates to any computer program product comprising program code instructions for performing the steps of a method according to any of the features listed above, when said program is executed on a computer.
Finally, the invention is applicable to any motor vehicle comprising an enabling device according to any of the features listed above.
[ Description of the drawings ]
Other features and advantages of the present invention will become apparent from a reading of the following description. The description is purely illustrative and should be read with reference to the accompanying drawings, in which:
figure 1 is a schematic representation of a motor vehicle equipped with an enabling device according to the invention,
Figure 2 is a schematic representation of predetermined detection areas inside and outside the vehicle,
Figure 3 is a schematic representation of three phases of detection, location and authentication of a user according to an enabling method according to the present invention,
Figure 4 is a schematic representation of an enabling device according to the present invention,
FIG. 5 is a flow chart illustrating the steps of an enabling method according to the present invention.
Detailed description of the preferred embodiments
Fig. 1 shows a motor vehicle V equipped with a device D for enabling vehicle functions according to the invention.
The vehicle function may be to lock or unlock an opening of the vehicle V, such as unlocking the driver door P, i.e. taking the vehicle V.
The activation of the function is triggered by visual recognition of the user authorized to use the vehicle V. The vehicle V has performed pre-authentication of the user's face in order to record and store data relating to the user's face in order to authorize subsequent retrieval requests.
Visual identification for access equipment is known to those skilled in the art and will not be described in further detail herein.
According to the invention, the enabling device D comprises at least one camera C1, C2 oriented towards the outside of the vehicle and equipped with visual recognition means, and an Ultra Wideband (UWB) transceiver EM1 able to detect the presence of the vehicle interior. In the example illustrated in fig. 1, two cameras C1, C2 are located on both sides of the driver door P.
Thus, the camera C1 is able to visually display any object close to the vehicle, preferably close to the opening (here the door intended to be locked or unlocked), on the side where the camera is fixed.
The Ultra Wideband (UWB) transceiver EM1 itself is preferably located inside the vehicle V and is used to detect the presence of any presence in the passenger compartment, for example of children.
In the example illustrated in fig. 1, two transceivers EM1, EM2 are located in the passenger compartment of the vehicle V. Two transmitters instead of only one enables a more accurate localization of the presence in the passenger compartment.
According to the invention and contrary to the prior art, the transceivers EM1, EM2 have been modified so as to emit UWB waves extending outside the passenger compartment in a predetermined zone Z3, Z11, Z21 around the vehicle V (for example within a radius of 5 meters around the vehicle V).
For this purpose the transceivers EM1, EM2 have been modified in that each transmitter comprises two antennas, one oriented towards the interior of the vehicle V and one oriented towards the exterior of the vehicle V, whereby these antennas have different radiation due to their orientation.
A switch is connected to the two antennas and allows selection of one or the other of the two antennas. Such devices are known from the prior art.
Alternatively, each transceiver comprises two antennas oriented in the same way but out of phase, and in the case of opposite phases, the radiation pattern so produced is oriented both towards the inside of the vehicle V and towards the outside of the vehicle. Such devices are also known from the prior art and will not be further developed here.
The enabling device D further comprises a central control unit 10 electrically connected to the transceivers EM1, EM2 and the cameras C1, C2.
The central control unit 10 is used for managing the transmission and reception of UWB waves by means of the transceivers EM1, EM2, but also for triggering the activation or the deactivation of the cameras C1, C2 and for processing information from said cameras. Thus, the central control unit 10 also comprises image processing and visual recognition means. This is known in the art and will not be described in more detail here.
Ultra Wideband (UWB) communication refers to radio frequency communication based on pulse transmissions of very short duration (typically less than one nanosecond). Thus, the bandwidth may reach values between 250MHz and 500MHz and even higher.
According to the invention, the enabling device D further comprises:
a. changing means M1 for changing the refresh rate F of the emitted wave,
B. A detecting means M2 for detecting a present body in a predetermined area around the vehicle and for adjusting the device according to the position of the present body,
C. frequency adjustment means M3 for adjusting the refresh rate F in accordance with the distance d between the presentity and the vehicle, the frequency being higher when the presentity approaches the vehicle,
D. Camera enabling means M4 for enabling the camera only if an presentity has been detected at a distance d below a threshold value,
E. And vehicle function enabling means M5 for enabling a vehicle function according to the identification result of the presentity by visual recognition.
The changing means M1, the detecting means M2, the frequency adjusting means M3, the camera enabling means M4, and the vehicle function enabling means M5 are preferably in the form of software included in an integrated circuit of the central control unit 10 (see fig. 4).
The refresh rate F is understood to mean the number of frames transmitted per second. Each frame contains waves of a plurality of predefined durations (e.g., 5 ms). The refresh rate is thus used to adjust the speed at which the UWB transceivers EM1, EM2 receive data in their coverage areas.
Thus, according to the present invention, the changing means M1 is able to change the refresh rate F of the UWB transmission wave from f0=1 Hz to more than f2=100 Hz. The higher the refresh rate F, the more energy the transceiver consumes (here, power from the battery of the vehicle V) and the more accurate the positioning of the presentity. Conversely, the lower the refresh rate F, the less energy is consumed by the transceivers EM1, EM2, but the more inaccurate the positioning of the presentity.
The present invention proposes to use the variation of the refresh rate F to accurately detect the presence of a body in the zone Z11, Z21 close to the vehicle V and therefore to activate the cameras C1, C2 to trigger visual recognition only when the presence is in the zone close to the vehicle V, while saving energy in the battery.
The detection means M2 for detecting the presence of a body in a predetermined area and for adjusting the device according to the position of the presence relative to the vehicle or relative to the predetermined area comprises:
a. Device for calculating a frequency offset between the frequency of a transmitted wave and the frequency of a received reflected wave, and
B. device for calculating the time of flight of waves in a round trip between a transceiver EM1, EM2 and a living being, and
C. means for determining the angle of arrival of the reflected waves received by the transceivers EM1, EM 2.
These different means are known to the person skilled in the art.
In order to reduce the power consumption, the detection means M2 consist only of means for calculating the frequency offset when the refresh rate is slow (for example f0=1 Hz) but sufficient to detect the presence of a body in the predetermined zone Z3 furthest from the vehicle V. These devices are of the doppler radar type. In order to detect the presence in the predetermined zones Z11, Z21 close to the vehicle, the time of flight of the wave and the angle of arrival of the reflected wave are determined in order to obtain a more accurate position of the presence around the vehicle V and thus calculate the distance d of the presence from the vehicle V.
Alternatively, in the case of two transceivers EM1, EM2, triangulation or cross-referencing between the data of the two transmitters still allows accurate positioning.
If the transceiver EM1, EM2 has detected a presence in the zone Z11, Z21 (see fig. 2) close to the surroundings of the vehicle, i.e. only if said presence is located at a distance d from the vehicle below a predefined threshold, the camera enabling means M4 are used to activate one or more cameras C1, C2.
Finally, the vehicle function enabling device M5 locks or unlocks the opening of the vehicle V according to the result of visual recognition of the user U in the images captured by the cameras C1, C2.
According to the embodiments described below, the central control unit 10 further comprises a processor 100 and a memory 101 (see fig. 4), in which instructions are stored, which allow the processor to be configured to perform certain specific processing operations, in particular to implement the steps of the enabling method.
The enabling method shown in fig. 5 will now be described. The method demonstrates that the enabling function is to unlock the opening of the vehicle V.
In a first step E1, the transmission of ultra-wideband waves in a predetermined zone Z3 (i.e. within a radius of about 5 meters around the vehicle V) using a first low refresh rate F0 of about 1Hz is triggered by the transceivers EM1, EM 2. The advantage of this emission mode of emission at a very low refresh rate F0 is that the power consumption is very small (about 10 mW).
If a human presentity or object is located in the predetermined zone Z3 (i.e., the zone furthest from the vehicle V) (step E1), the transmitted wave will be reflected by the presentity and then received back by the vehicle V. This is shown on the left side of fig. 3.
The reflected wave is processed and analyzed, for example, a frequency offset is calculated, which is used to detect the presence of a body in a predetermined area Z3 (for example, 5 meters around the vehicle V) as in the case of a doppler radar.
If there is a bank in the predetermined area (step E1), the refresh rate is increased to a second value F1, which is greater than the first value, for example about 10Hz. Emitting waves at this refresh rate F1 (step E2) will of course consume more energy, about 150mW, but allow to more accurately determine the position of the presentity and confirm its association with the predetermined zone Z3.
This is illustrated by the middle diagram in fig. 3.
If it is confirmed that the presentity is located in the predetermined zone Z3 away from the vehicle (step E3), the refresh rate is increased to a third value F2 of approximately 100 Hz. At this speed, the power consumption is still higher, about 300mW, but the emission of waves at this frequency (step E4) makes it possible to determine whether the presentity has moved closer to the vehicle and is now located in the zone Z11, Z21 close to the vehicle V, for example within a radius of 2 meters around the vehicle V, and makes it possible to accurately locate the presentity. This is shown on the left side of fig. 3.
In this case, the invention proposes to use the calculation of the time of flight in combination with the calculation of the frequency offset between the transmitted wave and the received wave and optionally the determination of the angle of arrival of the reflected wave in order to more accurately estimate the distance d between the presentity and the vehicle V.
If a presence body is located in the proximity zone Z11, Z21 (step E5), the use of the transceivers EM1, EM2 as doppler radars makes it possible to detect the presence body in the coverage area of the transmitter (i.e. 5 meters around the vehicle) and thus the intrusion of the presence body in this zone Z3.
The use of the time of flight and the angle of arrival itself makes it possible to locate the presentity more accurately and to find out whether the presentity is located in the zone Z11, Z21 close to the vehicle in order to enable the cameras C1, C2. Thus, not only the refresh rate is to be adjusted according to the position of the presentity, but also the detection means for detecting the presentity.
If the presentity is located at a distance d below a predefined threshold, e.g., less than 2 meters from the vehicle, cameras C1, C2 are enabled (step E6) to capture an image of the presentity.
Then, the face of the user U authorized to enter the vehicle V is identified or not identified (step E7) using image processing software. If the user U is authenticated (step E7), the function is enabled (here, unlocking the opening) (step E8 a), whereas if the result of the visual recognition is that no authorized user is recognized, the function is not enabled (step E8 b).
In the case of locking, the steps (not shown) are as follows. In a first step, UWB waves are transmitted to the outside of the vehicle at a first frequency f0=100 Hz, and then reflected waves are received by the enabling device D. The first refresh rate F0 used is highest when the enabling device D that the user was previously used to detect the presence of a body in the passenger compartment is detected as being inside the vehicle. Analyzing and processing the frequency of the received wave and/or the round trip time of flight of the wave makes it possible to determine the distance d the user U is spaced from the vehicle V.
When the user leaves his vehicle, the distance will be below the threshold value, because the user U is located in the zone Z11, Z21 close to the vehicle V.
In this case, one or more cameras C1, C2 are enabled to capture an image of the presentity, and then to implement visual recognition of the presentity.
If the user is identified as authorized to access his vehicle V, a lock on the opening is triggered.
The invention is particularly inventive in that it saves energy and requires little modification and is therefore inexpensive.

Claims (8)

1.一种用于通过启用设备(D)、基于对用户(U)的视觉识别来启用车辆功能的方法,该启用设备(D)包括至少一个相机(C1,C2)以及至少一个超宽带(UWB)收发器(EM1,EM2),该至少一个相机朝向该车辆的外部定向并且配备有视觉识别装置,该至少一个超宽带收发器能够检测该车辆内部的存在体,该方法的特征在于,首先将该收发器(EM1,EM2)修改成允许该收发器以不同的刷新速率(F)向该车辆的外部进行发射,并且该方法包括以下步骤:1. A method for enabling a vehicle function based on visual recognition of a user (U) by means of an enabling device (D), the enabling device (D) comprising at least one camera (C1, C2) oriented towards the outside of the vehicle and equipped with visual recognition means and at least one ultra-wideband (UWB) transceiver (EM1, EM2), the at least one camera being oriented towards the outside of the vehicle and being equipped with visual recognition means, the at least one ultra-wideband transceiver being able to detect a presence inside the vehicle, the method being characterized in that firstly the transceiver (EM1, EM2) is modified to allow it to transmit towards the outside of the vehicle at a different refresh rate (F), and the method comprising the following steps: a)以第一刷新速率(F0)向该车辆的外部发射超宽带波,a) transmitting ultra-wideband waves to the exterior of the vehicle at a first refresh rate (F0), b)接收反射波,b) receiving the reflected wave, c)检测在该车辆周围的预定区域(Z3,Z11,Z21)中的存在体,c) detecting a presence in a predetermined zone (Z3, Z11, Z21) around the vehicle, d)根据所述存在体与该车辆之间的距离(d)来调整该刷新速率(F1,F2),当该存在体靠近该车辆时,该频率更高,d) adjusting the refresh rate (F1, F2) according to the distance (d) between the entity and the vehicle, the frequency being higher when the entity is closer to the vehicle, e)仅当已在低于阈值的距离(d)处检测到该存在体时才启用该相机(C1,C2),e) enabling the camera (C1, C2) only if the being has been detected at a distance (d) below a threshold, f)通过视觉识别来标识该存在体,f) identifying the entity by visual recognition, g)如果该存在体被标识为该用户(U),则启用该车辆功能。g) If the being is identified as the user (U), the vehicle function is enabled. 2.如前一项权利要求所述的启用方法,其特征在于,该刷新速率(F0,F1,F2)的值从1Hz变化到超过100Hz。2. The activation method according to the preceding claim, characterized in that the value of the refresh rate (F0, F1, F2) varies from 1 Hz to more than 100 Hz. 3.如前述权利要求中任一项所述的启用方法,其特征在于,该距离(d)是通过计算这些波的飞行时间和/或通过计算这些发射波的频率与接收到的这些反射波的频率之间的偏移来确定的。3. An activation method according to any of the preceding claims, characterized in that the distance (d) is determined by calculating the flight time of the waves and/or by calculating the offset between the frequency of the transmitted waves and the frequency of the received reflected waves. 4.一种用于启用车辆功能的设备(D),启用是通过对用户(U)的视觉识别来触发的,该启用设备包括至少一个相机(C1,C2)以及至少一个超宽带(UWB)收发器(EM1,EM2),该至少一个相机朝向该车辆的外部定向并且配备有视觉识别装置,该至少一个超宽带收发器能够检测该车辆内部的存在体,该设备(D)的特征在于,所述收发器(EM1,EM2)被修改以便向该车辆的外部进行发射,并且该设备还包括:4. A device (D) for enabling a vehicle function, the enabling being triggered by visual recognition of a user (U), the enabling device comprising at least one camera (C1, C2) oriented towards the outside of the vehicle and equipped with visual recognition means, and at least one ultra-wideband (UWB) transceiver (EM1, EM2), the at least one camera being oriented towards the outside of the vehicle and being equipped with visual recognition means, the at least one ultra-wideband transceiver being able to detect a presence inside the vehicle, the device (D) being characterized in that the transceiver (EM1, EM2) is modified so as to transmit towards the outside of the vehicle, and the device further comprising: a)改变装置(M1),该改变装置用于改变发射波的刷新速率(F0,F1,F2),a) a changing device (M1) for changing the refresh rate (F0, F1, F2) of the transmitted wave, b)检测装置(M2),该检测装置用于检测在该车辆周围的预定区域(Z3,Z11,Z21)中的存在体并且用于根据该存在体的位置来调整该装置,b) a detection device (M2) for detecting a presence in a predetermined zone (Z3, Z11, Z21) around the vehicle and for adjusting the device according to the position of the presence, c)频率调整装置(M3),该频率调整装置用于根据所述存在体与该车辆之间的距离(d)来调整该刷新速率,当该存在体靠近该车辆时,该频率更高,c) a frequency adjustment device (M3), which is used to adjust the refresh rate according to the distance (d) between the entity and the vehicle, when the entity is close to the vehicle, the frequency is higher, d)相机启用装置(M5),该相机启用装置用于仅当已在低于阈值的距离(d)处检测到该存在体时才启用该相机(C1,C2),d) camera enabling means (M5) for enabling the camera (C1, C2) only when the being has been detected at a distance (d) below a threshold, e)车辆功能启用装置(M6),该车辆功能启用装置用于根据通过视觉识别来标识所述存在体的结果来启用该车辆功能。e) A vehicle function enabling device (M6) for enabling the vehicle function according to the result of identifying the entity through visual recognition. 5.如前一项权利要求所述的启用设备(D),其特征在于,该刷新速率(F0,F1,F2)的值在1Hz与超过100Hz之间变化。5. An enabling device (D) as claimed in the preceding claim, characterised in that the refresh rate (F0, F1, F2) has a value varying between 1 Hz and more than 100 Hz. 6.如权利要求4和5中任一项所述的启用设备(D),其特征在于,用于检测并且用于调整所述装置的该检测装置(M2)包括用于计算这些波的飞行时间和/或用于计算发射波的频率与接收波的频率之间的偏移的装置。6. An enabling device (D) as described in any one of claims 4 and 5, characterized in that the detection device (M2) for detecting and for adjusting the device includes a device for calculating the flight time of these waves and/or for calculating the offset between the frequency of the transmitted wave and the frequency of the received wave. 7.一种计算机程序产品,包括程序代码指令,当在计算机上执行所述程序时,这些程序代码指令用于执行如权利要求1至3中任一项所述的方法的步骤。7. A computer program product comprising program code instructions for executing the steps of the method according to any one of claims 1 to 3 when the program is executed on a computer. 8.一种机动车辆(V),其特征在于,该机动车辆包括如权利要求4至6中任一项所述的启用设备(D)。8. A motor vehicle (V), characterised in that it comprises an enabling device (D) as claimed in any one of claims 4 to 6.
CN202411029432.5A 2023-09-20 2024-07-30 Method for enabling vehicle functions and associated enabling device Pending CN119659525A (en)

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